## Abstract

The study focuses on wave induced oscillations of flow inside a

narrow gap formed by two identical boxes arranged side-by-side.

The problem to be analysed is that of gap resonance behaviours

with different gap entrance shapes, incident wave steepness and

model scales. We employ the open-source CFD package

OpenFOAM and restrict the problem to two-dimensional

geometry and fixed boxes. It is found that as wave steepness

increases, the frequency corresponding to the maximum response

of the fluid in the gap will shift to higher frequency and the

response curve closely resembles that of a Duffing oscillator with

a hardening spring (as also reported by Vinje, 1991), depending

on different entrance shapes. The results also show that a

pronounced scaling effect is more evident for cases with rounded

corners compared with counterparts with square corners or bilge

keels. This may have implications for drawing conclusions

applicable to full scale from wave tank tests.

narrow gap formed by two identical boxes arranged side-by-side.

The problem to be analysed is that of gap resonance behaviours

with different gap entrance shapes, incident wave steepness and

model scales. We employ the open-source CFD package

OpenFOAM and restrict the problem to two-dimensional

geometry and fixed boxes. It is found that as wave steepness

increases, the frequency corresponding to the maximum response

of the fluid in the gap will shift to higher frequency and the

response curve closely resembles that of a Duffing oscillator with

a hardening spring (as also reported by Vinje, 1991), depending

on different entrance shapes. The results also show that a

pronounced scaling effect is more evident for cases with rounded

corners compared with counterparts with square corners or bilge

keels. This may have implications for drawing conclusions

applicable to full scale from wave tank tests.

Original language | English |
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Title of host publication | Proceedings of the 20th Australasian Fluid Mechanics Conference |

Editors | Greg Ivey, Nicole Jones, Tongming Zhou |

Publisher | Australasian Fluid Mechanics Society |

Number of pages | 4 |

ISBN (Print) | 978-1-74052-377-6 |

Publication status | Published - 2016 |

Event | Australasian Fluid Mechanics Conference - , Australia Duration: 1 Jan 2011 → … |

### Conference

Conference | Australasian Fluid Mechanics Conference |
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Country/Territory | Australia |

Period | 1/01/11 → … |